body{
  background-color:white;
  width:50%;
  float:left;
  margin-left:25%;
  border-left:1px solid black;
  border-right:1px solid black;
  padding-left:30px;
    padding-right:30px;
    height:100%;
}

.boutonAvancement{
  margin-left:60px;
}

.title{
  color: grey;
  font-weight: bolder;
    border-bottom:1px solid black;
}

input[type="submit"]
{
  background-color: red;
}

